Eventide Orville Harmonizer cracking sounds on both channels, help?

It could be a number of things – it is not always possible to diagnose this from a distance, especially with so little information. That's why we have a Service Department.

You could narrow it down, and see if it occurs on both the A and B machines, on certain presets, with certain inputs and outputs, on certain channels, etc.

It is not obvious what is causing it, nor is it a common problem. My first guess is that it is a power supply issue.

This unit is now probably well over 10 years old, so it could have a number of issues. Nothing more I can add.

2 possibilities: unit is sandwiched between 2 digital devices and wordclock hasn't been set correctly. Otherwise, it might be your analog input/input gain levels are too high, thus exposing a noise floor.

Yes, the Orville is worse than most things I've come across when clocked incorrectly.

Try setting the system clock to a different value and changing back, double checking word clock is not selected if you are suing analogue i/o or ensuring that if you are using digits, that your clock source is the correct device, ie wordclock or embedded within the AES stream.

Erroneous settings can cause extremely unpleasant artefacts…

When its clocked right, however, the Orville sounds mmmmm…..

Of course it could be an electrical fault, but…